Advertisements
Advertisements
प्रश्न
Two coins are tossed simultaneously. The probability of getting at the most one head is ______.
विकल्प
`1/2`
`1/4`
`3/4`
1
उत्तर
Two coins are tossed simultaneously. The probability of getting at the most one head is `underline(3/4)`.
Explanation:
When two coins are tossed simultaneously
Sample Space= {HH, HT, TH, TT}
Thus,
Probability of getting at most one head = `({T T, HT, TH})/({HH, HT, TH, T T})`
= `3/4`
Thus, the probability of getting at most one head is `3/4`.
APPEARS IN
संबंधित प्रश्न
A bag contains 3 white, 5 black and 2 red balls, all of the same shape and size. A ball is drawn from the bag without looking into it, find the probability that the ball drawn
a black ball.
A bag contains 3 white, 5 black and 2 red balls, all of the same shape and size. A ball is drawn from the bag without looking into it, find the probability that the ball drawn
not a black ball.
In a single throw of a dice, find the probability of getting a number less than or equal to 4.
In a single throw of a dice, find the probability of getting 8.
A dice is thrown once. Find the probability of getting an even number.
A dice is thrown once. Find the probability of getting an even number or a multiple of 3.
For the following experiment write sample space ‘S’ and number of sample points n(S).
One coin and one die are thrown simultaneously.
Form a ‘Road safety commitee’ of two, from 2 boys (B1, B2) and 2 girls(G1, G2). Complete the following activity to write the sample space.
(a) Committee of 2 boys = 
b) Committee of 2 girls =
(c) Committee of one boy and one girl =
Write sample space ‘S’ and number of sample point n(S) for the following experiment. Also write events A, B, C in the set form and write n(A), n(B), n(C).
Three coins are tossed simultaneously.
Condition for event A : To get at least two heads.
Condition for event B : To get no head.
Condition for event C : To get head on the second coin.
If two dice are rolled simultaneously, find the probability of the following event.
The sum of the digits on the upper faces is at least 10.
If two dice are rolled simultaneously, find the probability of the following event. The sum of the digits on the upper faces is 33.
There are 15 tickets in a box, each bearing one of the numbers from 1 to 15. One ticket is drawn at random from the box. Find the probability of event that the ticket drawn - shows an even number.
A two digit number is formed with digits 2, 3, 5, 7, 9 without repetition. What is the probability that the number formed is a multiple of 5 ?
Two coins are tossed simultaneously. Complete the following activity of writing of the sample space (S) and expected outcomes of the events :
1) Event A : to get at least one head.
2) Event B : to get no head.
Activity : If two coins are tossed simultaneously
∴ s = {`square , "HT","TH", square`}
1) Event A : at least getting one head.
∴ A = {`"HH" , square , "TH"`}
2) Event B : to get no head.
∴ B = {`square`}
Two coins are tossed simultaneously. Write the sample space ‘S’.
Write the sample space if two coins are tossed.
When two dice are thrown, the number of sample points in the sample space are ______
Write a sample space when a die is thrown
If one coin is tossed, write the sample space ‘S’.
Two coins are tossed simultaneously. Complete the following activity to write the sample space and the given events A and B in the set form:
Event A: To get at least one head.
Event B: To get no head.
Activity:
Two coins are tossed simultaneously.
∴ Sample space is
S = `{square, HT, TH, square}`
Event A: To get at least one head.
∴ A = `{square, HT, TH}`
Event B: To get no head.
∴ B = `{square}`
